39 search results - page 5 / 8 » Join-distinct aggregate estimation over update streams |
PODS
2003
ACM
14 years 8 months ago
2003
ACM
The sliding window model is useful for discounting stale data in data stream applications. In this model, data elements arrive continually and only the most recent N elements are ...
VLDB
2007
ACM
14 years 8 months ago
2007
ACM
As computer systems are essential components of many critical commercial services, the need for secure online transactions is now becoming evident. The demand for such application...
PODC
2006
ACM
14 years 2 months ago
2006
ACM
We study the problem of maintaining sketches of recent elements of a data stream. Motivated by applications involving network data, we consider streams that are asynchronous, in w...
SSD
2007
Springer
14 years 2 months ago
2007
Springer
Abstract. Massive data streams of positional updates become increasingly difficult to manage under limited memory resources, especially in terms of providing near real-time respons...
VLDB
2007
ACM
14 years 8 months ago
2007
ACM
We present STAR, a self-tuning algorithm that adaptively sets numeric precision constraints to accurately and efficiently answer continuous aggregate queries over distributed data...